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arXiv 1105.0102hep-phgr-qchep-th
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有挠的中性介子振荡

Neutral-meson oscillations with torsion

Nikodem J. Poplawski

摘要:

我们提出了一个简单的机制,可以解释在宇宙中观察到的粒子-反粒子不对称性。在爱因斯坦-嘉当-夏玛-基布尔引力理论中,物质的内在自旋产生时空扭曲。有挠的经典狄拉克场服从非线性Hehl-Datta方程,该方程在电荷共轭变换下是非对称的。因此,在极早期宇宙中存在的极高密度下,费米子比反费米子具有更高的有效质量。因此,由一个轻夸克和一个重反夸克组成的介子比它的反粒子具有更低的有效质量。因此,在热平衡中的中性介子振荡有利于轻夸克和重反夸克的产生,这可能与重子生成有关。

英文摘要:

We propose a simple mechanism that may explain the observed particle-antiparticle asymmetry in the Universe. In the Einstein-Cartan-Sciama-Kibble theory of gravity, the intrinsic spin of matter generates spacetime torsion. Classical Dirac fields in the presence of torsion obey the nonlinear Hehl-Datta equation which is asymmetric under a charge-conjugation transformation. Accordingly, at extremely high densities that existed in the very early Universe, fermions have higher effective masses than antifermions. As a result, a meson composed of a light quark and a heavy antiquark has a lower effective mass than its antiparticle. Neutral-meson oscillations in thermal equilibrium therefore favor the production of light quarks and heavy antiquarks, which may be related to baryogenesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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